Heating system and boiler construction



March 18, 1930. v sw E 1,751,297,

HEATING SYSTEM AND BOILER CONSTRUCTION Filed May 2, 1929 Patented Mar. 18, 1930 PATENT OFFICE AMOS H. SWANDER, OF WOBLAND, WYOMING I HEATING SYSTEM AND BOILER CONSTRUCTION Application filed May 2, 1929.

This invention relates to steam or hot water boilers, and has for its principal object the provision of a boiler which will be highly efficient and in which the water will be brought into direct and intimate contact with,

the heating medium.

Another object of the invention is to provide a boiler in-which the boiler tubes can be quickly and easily inserted or removed for renewal and repairs.

A still further object ofthe invention is to provide a boiler construction in which the boiler tubes will be effectively sealed to the heads without the use of riveting, welding, and the like.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efficiency. These will become more apparen from the following description.

In the following detailed description of l the invention reference is had to the accompanying drawing which forms apart hereof.

Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. 1 is a side elevation of a heating plant in which the invention is embodied. In this view the boiler and firepot have been partially broken away to show the interior construction. v

Fig. 2 is an enlarged bottom view of the boiler looking upwardly from the line 2-2, 5 Fig. 1. In this View the tube plate 28 has i been partially broken awayto illustrate the extremities of the boiler tubes. Fig. 3 is a still more enlarged cross section through the bottom of the boiler taken on the line 3-3, Fig. 2.

The invention is more particularly applicable to heating plants of the type employed for heating radiation in buildings and the like, and may be applied to either steam or hot water heating systems.

y In systems of this nature it is generally necessaryto maintain a relatively large supply of water but if all of this large volume of water is admitted to the heating boiler simultaneously it can not come in effective Serial No. 359,819.

contact with the boiler tubes and heating surfaces, unless an excessively large boiler is employed.

- In this invention, a relatively long, narrow boiler is employed, such as illustrated at 10 and an auxiliary water tank 11 is used to contain a supply of water for the boiler. By

this construction the water in the boiler 10 isbrought in closer contact with the heating tubes and a smaller number of heating tubes are required and a more efficient transfer of heat is obtained than if all of the water in both the boiler and the tank 11 was contained within the boiler.

By constructing the boiler 10 relatively long and narrow the heat from the fire can be more eflectively absorbed before the hot gases leave the boiler.

The boiler 10 is provided with the usual appurtenances such as a water glass 12, pressure gauge 18, andsafety valve 14, and is supported on a suitable firepot 15 in which preferably, but not necessarily, a gas burner 16 is arranged. v

The hotwater or steam flows to the radiators of the heating system from the boiler 10 through a feed main 17 and returns from the radiators through a return main 18 to the tank 11. The water flows from the bottom of the tank 11 through a supply pipe 19 and a check valve 20 which prevents the return of water from the boiler to the tank 11.

The system operates in a closed circuit from the feed main 17, throughthe radiators, and into the return main 18. Thus, when'the steam is first turned into the feed main 17 it will condense in the system and flow back through the return main 18 to the tank 11. As the system heats condensation will lessen and steam will flow through-the system to fire tubes 21 and discharges through a suitable stack 22. It is desired to call attention to the efl'ective method employed for securing the fire tubes 21 in the boiler.

The boiler is, of course, provided with heads 23 which are preferably welded therein, as shown at 24. The tubes 21 in the usual installation are formed ofmalleable copper, and are of a length to extend slightly beyond both the heads 23. The tubes 21 are passed through relatively tight tube .holes in the heads 23 and the extending-beyond portions thereof are turned outwardly and crimped to form annular flanges 25. Soft copper washers 26 surround the extremity of the tubes between the flanges and the heads 23.

On each head 23 a series of spaced-apart stud bolts 27 are Welded. A tube plate 28 is passed over the studs 27 and is clamped in place by means of clamp 'nuts 29 thereon.

The tube plate 28 is provided with flow open-- ings 30 which register over each of the tubes 21. As the nuts 29 are tightened the tube plate 28 will positively clampthe flanged extremities 25 of the tubes 21 and the washers 26 against the heads 23 so as to eflectively seal the boiler at this point.

It is desired to call attention to the eflectiveness of this method of tube installation.

No welding, riveting, caulking, or expanding is required. Any lrregularities' in the-flange tubes will be flattened out and eiiectively sealed by the pressure of the tube plate 28.

Any' imperfections in the length of the fire tub es 28-will be corrected by the pressure of complished b relatively unskilled labor.

Should it e necessary to remove any or all of the tubes the nuts 29 can be quickly loosened and the plates 28 removed, allowing the damaged tubes to be withdrawn and new ones to be inserted without the use of special equipment or apparatus.

While a specific form of the improvement has been described and illustrated herein, it

is desired to be understoodthat the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what I claim and desiresecured by Letters Patent is 1. A boiler comprising: a boiler shell, I

heads in each extremity of said shell having tube holes therein; tubes extending through said boiler and through said holes; flanges formed on said tubes on the outer faces of said heads; a tube plate provided with flow openings for said tubes; and means for clamping one of said tube plates against said flanges on each of said heads so as to seal said tubesto -said heads.

2. A boiler comprising: a boiler shell,

heads in each extremity of said shell having tube holes therein; tubes extending through said boiler and through said holes; flanges formed on said tubes 0n the outer faces of said heads; atube plate provided with flow.

in alignment with said tube; and means for clamping said tube plate against said flange.

4. In a boiler having a head with tube holes therein, means for securing boiler tubes in said holes comprising'z'a flange formed in the extremity of said tube; means for clamping said flange against said head, said means comprising: a tube plate having a flow opening in alignment with said tube; and means for clamping said tube plate against said flange, said latteromeans comprising: studs projecting from said head and arranged to pass through said plate; and nuts on said studs adapted to clamp against said plate.

In testimony whereof, I affix my signature.

AMOS H. SVVANDER. 

